Objectives: The goal of this research was to find out whether the students with functional disorders (sleeping disorder, weak concentration and bad mood) and overweight students have bad life habits.Study Design: Cross-sectional research.Participants and methods: Examinees were students of the two final years of the integrated undergraduate and graduate medical studies ( 5th and 6th year ) in Osijek. The research was conducted with the specially created questionnaire which the examinees were asked to fill in. There are 31 question in the questionnaire.Results: The data of 116 5th and 6th year medical students in Osijek were processed. The results indicated to the presence of at least one functional disorder with 95,7 % of the students. 87 % of the students with three or more disorders have poor physical activity. 87,9 % of the students learn in the afternoon or late in the evening. Students with more disorders frequently have bad life and learning habits: they often learn at night, they have irregular sleeping rhythm, they eat unhealthy food and take stimulants and they have significantly poorer physical activity compared to the students without or with less such disorders. These students often have lower grade average. They are also prone to distinct deviations from the normal body weight and the development of abdominal obesity.Conclusion: Bad life and learning habits can lead to functional disorders and obesity. This imposes the need for founding an advisory center for students, in order to help them to cope with the stress of studying and to avoid addictions and other negative influences on their health.